That's the premise of Nashville attorney David Callahan's blog, and it explains why he is never free on weekends: He's racing his way toward a goal he has vowed to reach by July.

Since his start date last July, Callahan has competed in races in 13 states, including California, Wisconsin and Florida, and completed as many as five races in one weekend. He has traveled over 14,000 miles by car, raced nearly 1,000 miles without serious injury and braved temperatures ranging from below freezing to 100 degrees Fahrenheit.

Callahan, a husband and father of a bouncing 13-month-old boy named Lincoln, says racing itself isn't as taxing as other parts of the process.

"The travel has been the biggest obstacle," he said. "It has been quite a challenge. (My son) has been to 17 states as part of this journey. … All he really knows on weekends is racing."

So why does Callahan do it? To raise money for Team Chad, a foundation inspired by Callahan's friend Chad Welch, who died of leukemia in 2007.

"When (Chad) was undergoing treatment, he witnessed that many patients were unable to obtain treatment because of all the ancillary expenses of life that were getting in the way," Callahan said. "He wanted to make sure that access to care was the least of the worries for the patients."

Callahan chose the 52-triathlon challenge because of its unique nature and the attention it could garner for Team Chad. So far, Callahan's triathlon effort has raised more than $33,000 for Team Chad. His inability to race during some winter weekends led him to participate in multiple races other weekends.

"I wanted to do something radically different from any other fundraiser that was around," he said. "I got my start in triathlon through the Leukemia and Lymphoma Society's Team-In-Training program, (and) I wanted to take that concept and expand it to a much more grand scale."

Amanda Foland, Callahan's friend and fellow racer, said in a blog post that she admired his dedication.

"I love to race, but racing two times in one weekend, for 52 weeks — I would dream of the day where I wasn't racing anymore," she said.

"You can tell how much Team Chad means to both David and (his wife) Maggie," Foland said. "He wouldn't be putting himself through all of this if he wasn't passionate about it."

Callahan said there was one race that made him doubt himself.

"It was one where I was 10 hours away from home racing my fourth race of the weekend. There was a moment during that race when I didn't want to be racing anymore. I could (have pulled) out of the race and relaxed," he said. "But that is something that [cancer patients] can't do. They do not get to decide when to stop ... they just have to keep going every day."